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Weather in Genève for September 2025

Your guide to Genève weather in September - trends and predictions
  • In general, the average temperature in Genève at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °C by the end of September.

  • Genève sees moderate rainfall in September, averaging 7 rainy days.

  • Is September a good time to visit Genève? check out the best time to travel to Genève page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/11°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Genève in September average weather

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Temperatures trend during September in Genève

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
27° /12° 2.8 mm 7
2 Sept. Sunny
Sunny
26° /12° 1.1 mm 7
3 Sept. Sunny
Sunny
26° /13° 15.1 mm 7
4 Sept. Mist
Mist
25° /14° 7.1 mm 6
5 Sept. Sunny
Sunny
24° /12° 2.1 mm 6
6 Sept. Sunny
Sunny
25° /11° 0 mm 6
7 Sept. Sunny
Sunny
28° /12° 0.7 mm 8
8 Sept. Sunny
Sunny
27° /13° 7.5 mm 7
9 Sept. Sunny
Sunny
22° /12° 3 mm 6
10 Sept. Sunny
Sunny
25° /11° 0.2 mm 6
11 Sept. Partly cloudy
Partly cloudy
24° /10° 8.6 mm 6
12 Sept. Partly cloudy
Partly cloudy
21° /8° 1.1 mm 5
13 Sept. Moderate rain
Moderate rain
15° /8° 5.2 mm 4
14 Sept. Overcast
Overcast
17° /8° 0 mm 4
15 Sept. Mist
Mist
21° /8° 0 mm 6
16 Sept. Patchy light drizzle
Patchy light drizzle
20° /9° 0.6 mm 5
17 Sept. Partly cloudy
Partly cloudy
20° /10° 0.2 mm 6
18 Sept. Light rain shower
Light rain shower
19° /10° 11.8 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
21° /8° 0.5 mm 5
20 Sept. Partly cloudy
Partly cloudy
22° /8° 0.4 mm 6
21 Sept. Patchy light drizzle
Patchy light drizzle
22° /9° 4.6 mm 5
22 Sept. Light rain shower
Light rain shower
18° /9° 9.1 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
15° /7° 19 mm 4
24 Sept. Sunny
Sunny
18° /6° 0.1 mm 5
25 Sept. Sunny
Sunny
20° /5° 0 mm 6
26 Sept. Sunny
Sunny
18° /8° 26.1 mm 5
27 Sept. Overcast
Overcast
19° /7° 3.3 mm 5
28 Sept. Partly cloudy
Partly cloudy
17° /7° 5.1 mm 4
29 Sept. Sunny
Sunny
20° /7° 0 mm 5
30 Sept. Sunny
Sunny
20° /9° 2.7 mm 5
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Important Notice
Our weather forecast for Genève in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Genève forecast closer to your planned date for the most up-to-date weather information.

Guide for Genève in September

In September, the weather in Genève, Switzerland, experiences a transition from the lingering warmth of summer to the crispness of early autumn. At the beginning of the month, the average temperature hovers around 18°, with pleasant, mild days and cooler evenings.

The city is often still basked in the remnants of summer, making it an ideal time to explore the charming streets and picturesque lakeside.

As the month progresses, the temperatures gradually begin to drop, with the average temperature decreasing to around 15° by the end of September. The weather becomes crisper, and the cityscape starts to showcase the beautiful autumnal colors.

Visitors can enjoy the changing scenery and take part in outdoor activities such as hiking or cycling in the surrounding countryside.

Overall, September in Genève offers a delightful blend of late summer warmth and early autumnal charm, making it an excellent time to visit for those who enjoy milder weather and wish to experience the city during a quieter period.

Genève in September - FAQ

Is September a good time to visit Genève?
Yes, September is a good time to traveling to Genève, read more about the best time to visit Genève.
What are the expected maximum and minimum temperatures in Genève during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Genève during September?
Moderate rainfall is anticipated in Genève during September, with a total of 55.7 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Genève during September?
The average wind speed in Genève during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Genève in September?

As you prepare for your trip to Genève in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Genève, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

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Location coordinates Where is Genève?

Get accurate weather forecasts for Genève, located at latitude 46.202 and longitude 6.146. Stay updated with localized weather information tailored for Genève.

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